When do IP's show up in the SHOW ARP command?

I do not fully understand when an IP address will show up in the output of the SHOW ARP command. For example, I have a VLAN on my CISCO 4006 Switch and I know there 4 dell PC's are connected to it. I thought that the IP's for those PC's would show up in the output of a SHOW ARP command so I could then get the MAC addresses of those PC's, run a SHOW MAC ADDRESS command, and find the port they are connected to. However, even though these PC's have been connected for quite some time, their IP addresses do not appear when I run a SHOW ARP command.

If I do a PING command while in ENABLE mode on the switch, does it start a ping and continually run it or does it just send out a few pings and then stop? On some devices (I think some test equipment like a Fluke Etherscope) I have seen a PING request go out and then it just keeps on running and runing. I want to make sure I don't start something like that on the Switch. If I just run the command PING 10.0.4.20 on the switch, will it only send out a few pings?

This tutorial will go through the steps required to write a script that will back up the configuration settings of a HP-ProCurve switch.
You will need to get the following things to follow this tutorial:
Telnet Scripting Tool e.g. TST10.exe
…

Hi there,
This article summarizes what you need if you are going to set up your home or small business Network Attached Storage (NAS) to be accessible from the internet. Of course there are configuration differences based on your NAS or router ma…

This video shows how to remove a single email address from the Outlook 2010 Auto Suggestion memory.
NOTE: For Outlook 2016 and 2013 perform the exact same steps.
Open a new email: Click the New email button in Outlook.
Start typing the address: …